AlwayOnNumLock

To keep the NumLock key always on（Accidental Touch protection）

This document is translated by Google, some representations may be inaccurate.

Introduction

When typing on the keyboard, we sometimes hit the NumLock key accidentially (especially for laptop users), which causes a lot of trouble.

This tool can help you temporarily disable the NumLock key.

Usage

The simplest way

Download the built binary from the Release page and run it.

Some hints

While the program is running, the NumLock key will be disabled and will always remain in its current state. After exiting the program, the disabled state of the keys will be automatically released.
By default, the window will be automatically minimized after the program runs, so it is normal to see a flicker.
If the program doesn't work, give it administrator rights and run it.
You can add it to auto-start by following steps：
1. Create a shortcut for AlwayOnNumLock.exe.
2. Press the Win+R key combination, type shell:startup and press Enter.
3. Move the created shortcut into the folder that popped up in step 2.

Development Guide

How it works

We register a low-level keyboard hook, WH_KEYBOARD_LL, to listen for keypress events.

If the target key code is detected, the function return 1 to truncate the message and achieve key shielding; otherwise, it return CallNextHookEx and continue to deliver the message.

Development environment configuration

Taking the Clion development environment as an example, the following configurations are required:

Modify the CMake build configuration file, set the toolchain to "Visual Studio 20xx", and set the generator to "Visual Studio 1x 20xx".
If you want to compile a "x86" target, you can fill in -A "Win32" in "CMake Options".

something worth noting

Be careful when modifying the following code.

If you comment out a case, or add a break; under a case, the behavior of the program changes greatly.

switch (wParam)
{
	case WM_KEYDOWN:
	case WM_SYSKEYDOWN:
	// case WM_KEYUP:
	//case WM_SYSKEYUP:
        
        // do something
        
	default:
		break;
}

hui-shao/AlwaysOnNumLock